DE966312C - Circuit arrangement for zone marking devices - Google Patents

Description

ISSUED JULY 25, 1957

S 28436 Villa j 21a ³

Herbert Töpfer, Munich

has been named as the inventor

The invention relates to a circuit arrangement for zone identification devices in telecommunications, in particular telephone systems with dialer operation, in which multi-digit codes over several, accordingly The zone identification selector set for the individual digits of a code is highlighted and in which a test switching means influenced by the zone identification device of your choice a non-zoned code prevents further connection establishment ■ and subsequent occupancy Switching elements cancels.

Arrangements have already become known in which only after all digits have been dialed a non-zoned Key figure switching means become effective, which prevent a further connection establishment and the Cancel the assignment of the following switching elements.

The invention strives to simplify and thus more economical design of the known zone marking devices with regard to non-zoned key figures, the activation of assigned switching elements to accelerate when choosing a non-zoned key figure. This is achieved by the Test switching means with the switching points of all switching points that do not allow zone detection or counting Zone identification selector is firmly connected and when setting the zone identification selector switch arms is excited at one of these switching points by a type of current, e.g. alternating current, which is different from that type of current, for example direct current, to which the others are passing the same switching arms of the zone identification selector to be switched on switching means of the zone counting device speak to.

Due to the fixed assignment of the test switching means to the bank contacts of all those used for zone evaluation Voters it is possible already during the

709 602/29

Pauses between two for the purpose of setting zone designation selectors transmitted series of impulses to check whether the selector set by the series of impulses entered before the break is on a not zoned point were set. This ensures that, for. B. after choosing a first Digit of a non-zoned code, the subsequent switching elements that have already been assigned are released will. Another advantage of the invention is

ίο in the fact that the zone identification selector does not have need to be equipped with additional switching arms for the elimination of non-zoned key figures.

The drawing shows an exemplary embodiment

Zone counter, of which only those for understanding of the inventive concept necessary circuit details are shown.

I. Choice of a zoned key figure

In the rest position of the zone counter and the switching element following it, the relay E in the former is continuously energized: +, EII, 32 k, 2gdgo, 26a, 23V, 21 ci, EI, 18s, test wire 6, - (in the following switching element) . The zone counting device is occupied by applying positive potential in the preceding switching element via the occupancy wire 3. The winding I of the occupancy relay C is excited via the contacts 1 e and 2ex, which switches on the auxiliary occupancy relay Ci via its contact 46 c.

Relay C continues to be in the occupancy circuit via its contact 4c. By opening its contact 3 c, the high-resistance winding II of the relay has also been switched into this circuit. The following switching element is assigned via contact 17 c. The auxiliary occupancy relay Ci switches the outgoing speech wires 4 and 5 through with its contacts 15ei and 16 c ι. Relay E remains energized through its winding II and closed contact 22CI. The dialing pulses excite, as voltage surges with positive potential via the speech wire 1, the surge receiving relay A connected to this wire via contact 10 c, which it forwards with its contact 14 a via the outgoing speech wire 4. Via contact 48 "the relay V is switched on at the beginning of each series of dialing pulses, which by shorting its low-resistance winding I via its own contact 4711 gives itself a drop-out delay, as a result of which the relay keeps its contacts in the working position during each series of dialing pulses. Relay V activates the outgoing speech vein 4 during each impulse transmission by opening its contact 13 w from the rear speech path.

The first series of dialing pulses picked up by relay A , which correspond to the code to be evaluated for tariffing the call, are simultaneously passed into the zone identification device. In the present example it is assumed that the code numbers consist of three digits. Accordingly, the zone marking device consists of a rotary selector Dg, the setting of which is controlled by the first digit of the code, and a lever-operated rotary selector HD, the first setting movement of which takes place according to the second and the second setting movement according to the third digit of the code number.

The winding I of the relay Z has been switched on via contact 46 c when the zone counter is occupied; in addition, as already mentioned, the relay E is switched on. The dialing pulses corresponding to the first digit of the code switch the rotary selector Dg via contacts 41 ″, 40 e, 38 r, 37 z and 35 c. During this, relay E is continued to be held via contacts 24a, 28 / and 340 independently of contact 26a. The rotary selector Dg closes its contacts 42 dgo and y> dgo and opens its contact 29 ^ 0 as soon as it is advanced from the rest position. After the first series of dialing pulses, relay V shorts winding I of relay Z with its contact 43 ν , which then brings its contacts back into the rest position. With contact 372 the circuit for the rotary selector Dg is interrupted, at contact 36 z a circuit for the lifting magnet H of the lifting rotary selector is closed. Relay E remains energized via contacts 25ei and 3oigo. _

The series of dialing pulses corresponding to the second digit of the code now energizes the lifting magnet H and sets the lifting rotary selector to a corresponding height increment. Relay V responds again and opens, among other things, its contact 43 v. A renewed response of the relay Z is prevented by its closed contact 442. Relay E remains energized via contacts 24 », 28 r and 34 e . When leaving the rest position, the lever-operated selector opens its head contact 32 k and closes the head contact 33 k. After the second series of dialing pulses, the relay E is switched on in a circuit running through the contacts 25 ci, 3ize> and 33 k. In this circuit is the winding I of the relay R, which is now also excited and its contacts in the working position. Relay R interrupts the circuit for the lifting magnet H at its contact 38 r and closes a circuit for the rotary magnet D via its contact 39 r , which is now advanced according to the third series of dialing pulses or according to the third digit of the code. After the first turning step, the shaft contact 31 w of the lever-operated rotary selector opens. Relay E and relay R, the winding II of which was released by opening contact 28 r , remain switched on via contacts 24 ν and 34 g. Your excitation circuit is interrupted after the third series of dialing pulses at contact 24 ν , whereupon both relays return their contacts to the rest position. The zone identification selectors are no longer influenced by the further series of dialing pulses that follow, since their setting circuits are interrupted at contact 40 e .

The switching or the like of the rotary selector Dg has been brought by the first code to a position iao in which it is connected according to the valid zoning with one of the three switching arms a, b or c of the Hebdrehwählers. The entirety of the bank contacts of the rotary lever to be reached by the last-mentioned switching arms is indicated in the figure by dashed squares. It is

further indicated that the switching points of the zone identification device, here the bank contacts of the rotary dial, to which this can be set by selecting a zoned code number, are each connected to one of several contacts 51 zg, 522g or 532g of a timer ZG in accordance with the zoning uniform time intervals different from one another are closed and negative potential is applied to the zoned switching points of the zone marking device.

If the called subscriber reports after the connection has been established, negative potential is applied to the speech wire 5 in one of the following switching elements, thereby energizing the relay G. Relay G removes the short circuit of winding I of relay Z at contact 45 g, which now responds again. The relay U responds via the contacts 55 g and 562 and binds itself via its contact 57 ″. The impulse receiving relay A is connected to contact 9 κ by the speech

ao vein 1 disconnected, contact to closes the backward loop over the speech vein 2 for the counting impulse transmission. Contact 19 «switches the relay G off. The winding II of the relay Z is switched on at the contact 20 w. Relay G returns its contacts to the rest position and, with its contact 45 g, causes relay Z to drop out with a delay due to a short circuit in winding I.

The high-resistance winding II of the throttle relay Dr was short-circuited with contact 12z and connected to the speech core 2 via the low-resistance winding I of this relay after the contact was closed to negative potential. Through this negative potential, a counting impulse receiving relay located in one of the preceding switching elements on the same voice wire was excited in a known manner, which in turn influences the conversation counter of the calling subscriber. When the relay Z drops out , the high-resistance winding Dr II has been released again. The mentioned, not shown counting impulse receiving relay now receives fault current and brings its contacts back to the rest position. The switching shocks occurring when the contact 122 is closed and opened are dampened by the capacitor Co 1 in such a way that they cannot be heard by the participants.

The other counting pulses are transmitted in the same way during the call at regular intervals corresponding to the zone. For this purpose, the winding II of the relay Z is energized in a circuit which runs via one of the contacts 51 zg, 522g or 533g, one of the switching arms a, b or c and the switching arm like the zone identification selector.

A description of the further switching processes up to the release of the connection is not provided, as they are not of interest in this context.

II. Choice of a non-zoned key figure

As indicated in the figure, via contact 50 » with the switching points of the zone identification device, here with the bank contacts 60, 61, 66

of the rotary selector, which do not allow zone detection or counting, a test relay S responding to alternating current is connected. If the calling subscriber chooses a non- zoned code, after the relay V has dropped via the switching arm ^ gI and one of the switching arms a, b or c of the zone identification selector, a circuit for the relay 5 is closed, which runs across the capacitor Co 2 and in one AC power source. Relay 5 responds and releases relay Ci at contact 49 s. Relay C 1 separates the outgoing speech wires 4 and 5 by opening its contacts 15 ei and 16 c ι and thus prevents further connection establishment. By opening the contact 18 s, the assignment of the following switching elements is also canceled, which now trigger and can be otherwise assigned again. The zone counter can no longer be influenced by further dialing pulses from the calling subscriber, since the surge receiving relay A is disconnected from the incoming speech wire 1 at the contact for 5 s. The busy signal Bes is inductively switched to the speech path via contacts 6 s and 8 s, causing the calling subscriber to hang up and thus release the rest of the connection.

As can be seen, no special contact means of the zone identification device are required for connecting the test relay S. Rather, the connection takes place via the same switching arms of the zone identification selector, via which the counting impulse transmission relay Z of the zone counting device is influenced when a zoned code number is selected. The fact that the relay Z and the test relay S can be influenced separately is ensured by the fact that the test relay S can only respond to alternating current.

In the figure it is also shown that the test relay S can respond after the selection of the first digit of the code, if this selection brings the zone identification drawing selector Dg into a position that does not allow zone detection or counting. It is assumed that this is the case if a 1 or one of the digits 5 through 9 is chosen as the first digit.

Claims (1)

PATENT CLAIM: Circuit arrangement for zone identification devices in telecommunications, in particular telephone systems with dialer operation, in which multi-digit codes are marked via several zone identification selectors set according to the individual digits of an identification number and in which a test switching means influenced by the zone identification device prevents further connection establishment after selecting a non-zoned identification number and the occupancy of subsequent ones Switching elements, characterized in that the test switching means (S) is permanently connected to the switching points (e.g. 1.5 to 9, 60 to 66) of all zone identification selectors (Dg, H, D) which do not allow zone detection or counting, and when setting the zone identification selector switch arms (dg I, a, b, c) to one of these switch points (i, 5 to 9, 6o to 66) is excited by a type of current, for example alternating current, which is different from that type of current, for example direct current, to which the other switching means to be connected via the same switching arms of the zone identification selector (Dg, H, D) (Z) address the zone counter. Considered publications: German Patent Nos. 288 027, 660 675; Austrian Patent No. 167 576; Langer: "Studies on the tasks of telephone technology" ·, Part 2: "Fernverkehr", 1944, p. 256, fig. 154; German patent application T 1021 VIII a / -2ia ³ . 1 sheet of drawings © 709 602/29 '7.57